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Low density parity code (LDPC) decoding for memory with multiple log likelihood ratio (LLR) decoders

  • US 8,301,979 B2
  • Filed: 10/07/2009
  • Issued: 10/30/2012
  • Est. Priority Date: 10/07/2008
  • Status: Active Grant
First Claim
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1. A computer-implemented method of decoding a representation of a codeword, comprising the steps of:

  • (a) applying a decoder to the representation of the codeword, the representation of the codeword comprises a set of bits, and the decoder associates a bit estimation with each bit indicating a probable value of the bit, each bit estimation has a respective absolute value;

    (b) if the applying of the decoder fails to decode the representation of the codeword, reducing the respective absolute value of each bit estimation to a certain value, thereby obtaining a modified decoder; and

    (c) applying the modified decoder to the representation of the codeword.

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